From Sputnik News in 2015:

The Richag-AV system, mounted on the Mi-8MTPR1 (a variant of the Mi-8MTB5-1 helicopter) is said to have no global equivalent. Its electronic countermeasures system is designed to jam radar, sonar and other detection systems in the aims of defending aircraft, helicopters, drones, ground and naval forces against air-to-air and surface-to-air defense systems within a radius of several hundred kilometers. It can be mounted on units from any branch of the armed forces, including helicopters and airplanes, as well as ground and ship-based forces.

The Mi8-MTPR1-based Richag-AV platform, using multi-beam antenna arrays with DRFM technology, is designed to actively jam and thus ‘blind’ radar systems in order to defend against radio-electronic guided weapons systems. In a combat situation, the system would operate as part of an aviation shock attack group aimed at breaking through virtually any defense system, blinding everything up to and including the US MIM-104 ‘Patriot’ anti-aircraft missile system.

This is the only Google source for “Richag-AV.”

It might have languished sans corroboration, but for this dumb fuck:

While Russia’s stated goal in moving into Syria is to fight the Islamic State, NATO’s top commander believes Russia’s new presence includes the first pieces of an intricate layer of defensive systems deployed to hinder U.S. and coalition operations in the region.

“As we see the very capable air defense [systems] beginning to show up in Syria, we’re a little worried about another A2/AD bubble being created in the eastern Mediterranean,” said Breedlove to an audience at the German Marshall Fund Monday.

A2/AD stands for anti-access/area denial. During the early stages of warfare, A2/AD could have been a moat around a castle, or spikes dug into the ground—anything to keep the enemy off a certain swathe of territory. In the 21st century, however, A2/AD is a combination of systems such as surface-to-air missile batteries and anti-ship missiles deployed to prevent forces from entering or traversing a certain area—from land, air or sea.

According to Breedlove, the introduction of an A2/AD bubble in Syria would be Russia’s third denial zone around Europe. The first and oldest he said, was in the Baltics where the Russian naval base in Kaliningrad has robust anti-air capabilities. The second zone—originating from Russian-occupied Crimea—covers the Black Sea.

“Russia has developed a very strong A2/AD capability in the Black Sea,” said Breedlove. “Essentially their [anti-ship] cruise missiles range the entire Black Sea, and their air defense missiles range about 40 to 50 percent of the Black Sea.”

Here’s an exhaustive tour of Russian defenses in Kaliningrad.  For the record, Russia has never invaded anybody.

It seems the Russians have had some fun with a couple of US naval assets, jamming their electronics, probably with Khibiny ECM pods on SU-24s, but perhaps not.